Type-writing machine.



PATENTED'DEG. 10, 190%. MERRITT.

W. J. BARRON & H. W

TYPE WRITING MACHINE. APPLIOATION rum) JUNE 3.1902.

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INVENTEI'FIE' MTNESEEE T TUHNEY PATENTED DEC. 10, 1907. W. J. BARRON & HI MERRITT.

TYPE WRITING MACHINE. APPLICATION FILED mm: 3.1902.

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of New York, and

' n I sra'rns WALTER J'. BARRON, OF NEW YORK, N. Y., AND HENRY W. MERRITT, OF SPRINGFIELD, MAs

SAGHUSETTS, ;ASSIGNORS TO DEN'SMORE TYPEWRITER COMPANY, OF SYRACUSE, New

YORK, A CORPORATION OF NEW YORK.

I TYPE-WBITIN G MACHINE.

Be it known that we, WALTER J. BARRON and, HENRY W. MERRITT, citizens of the United States, and residents, res ectively, of borough of Brookl count 0 Kings, city tate of ew York, and of Springfield, count of Hampden, and State 0' Massachusetts, ave invented certain new and useful Im rovements in Type-Writing Machines, of w ich the following is a specification.

Our invention relates to platen shifting.

mechanism for typewriting machines, the object of the invention being to rovide simple and efficient mechanism of t e character specified which may be actuated by any one of a plurality of shift keys when the platen is in] either the upper or lower case To these and other ends wh ch will appear osition.

in the following description our invention consists in the novel construction of features, arrangements of elements and combinations parts to be hereinafter described and claimed.

In the accompanying drawings wherein like reference characters designate corre-- sponding parts in the different v1ews, and wherein parts have been omitted or broken away Figure 1 is a front to rear vertical sectional view of one form of typewriting machine embodying our invention. Fig. 2 is afragmentary plan view of the same.

The present application is a division of our application Senal No. 92,839, filed Feb. 6, 1902, and while the invention is shown applied to a Densmore t pewn'ting machine, it should be understood that it may be employed in other characters of typewriting machines.

, 1 designates the main frame of the machine, 2 the usual top plate and 3 the key levers which. are connected by links 4, in a suitable manner, to actuate the type bars 5, which are pivoted to hangers 6 secured to the top plate .2. Each of the key levers 3 is provi ed with the usual figure key 7 and with a hook 8 which bears upon a transverse universal bar 9, that has arearwardly extending arm at each end which is pivoted to the frame of the machine at -10.

Pivoted to the universal bar 9, at 11, is a link 12 preferabl made of two parts, which may be adjustably united by screw threaded connections 13. The upper end of this link Specification of Letters Patent. Original application filed February 6. 1902. Serial No. 92.839. Divided and this application filed J 1119 3. 1902. Serial No. 110(042. i

IN, r ca.)

I 12 is provided with an eye 14 that en ages notched portion 15 of-an arm 16, w ch preferably in the form of a SCIBWpthLl? 6X1. v tends through a threaded hole in a depending stud 17 of the dog rocker, whereby they a said arm may be adjusted to brlng the inner move it further from the pivotal center of the rocker, in. or:

or regulate the throw imparted, 1

to the rocker and the feed dogs carried thereadjustment 13 enables the link 12 6,5 1 to be lengthened or shortened in accordance end thereof closer to orto der to vary by. The

with the adjustment of the arm 16. The

feed dogs 18 18 and their rocker 19 after actuation are returned to normal positlon by a spring 20, which is suitably connected at one end to an arm 2O on the rocker and at its other end to a fixed arm -21 on the machme frame. :The feed dogs 18 and 18 cooperate with a feed wheel 22, which is secured to a ried upon a shaft 24, and is prevente moving longitudinally thereon 1n one direcshaft 24 by a set screw. .The shaft 24 has cone bearings at'its ends which 006 crate with anti-friction balls 24 which r evo ve in I, circular race-ways. One raceway is formed in a bracket 24 that is secured to the top f plate 2 of the machine, and'the other race-, way is formed in a screw-threaded adjustable: v

plug 2 1: that takes into in the bracket arm 24 the bracket 24". cient ball bearing support is provided for the a threaded opening shaft 24 and the plug 24 may be turned by a screw driver, (a slot being provided in the plug for this purpose) to compensate for any v wear that may take place in the balls or the bearings.

An operative connection is maintiainedbetween the feed Wheel 22 and the shaft 24" which. has a feed with a feed rack 26.

From the foregoing understood that a movement of the feed dogs will permit the feed wheel to rotate and,

usual carriage-spring (not shown).

that project from a rock shaft 28 to which is secured a leaf spring 29, the free end of which bears against a portion of the carriage as pinion 25 secured to the A forward end thereof and this pinion meshes sleeve 23 that surrounds and is loosellyfcar- 75 rom which forms part of M By these means an elfidescription it will beioo thus permit the carriage to be moved by the 3 shown at in order to maintain the feed rack '26 normally in engagement with its 00- operating feed pinion 25. The rock shaft 28 is likewise provided with a lug 31 which. is bifurcated at 32 so as to provide stops 33 that cooperate with a fixed pin 34 carried by the carriage in order to limit the oscillation of the rock shaft. The rock shaft 29 likewise has a finger piece or arm 35 secured to one end thereof, preferably at the left hand end, so that a depression of this finger piece or arm will rock the shaft 28, thus disengaging the feed rack 26 from its pinion 25 to permit the carriage to be freely moved in either direction.

In the ordinary Densmore machine the paper carriage as an entirety comprises three distinct members, viz., a frame carrying the platen, a carriage in which the platen frame is mounted or supported and a truck or frame that carries the feed rack. The truck comprisesa frame 36, in which the rock shaft 28 that extends substantially from end to end of the frame, is pivoted. The rear portion of the truck 36 is grooved longitudinally at 37 to form a track for cooperation with horizontally disposed bearing rollers 38 carried by the 'rear guide rail 3 The guide rail 39 is secured to the top plate 2 of the machine by angular brackets 40 and one end of each of the brackets is secured to the topplate 2 by headed screws 41, which pass through slots and enter tapped holes in the top-plate.

Projecting forwardly from the truck 36 areeyes 42 that surround a tubular bearing,

sleeve 43 and which may be secured thereto by screws 44.. The sleeve 43 may be of any desired length and surrounds a traverse rod 4.5 which is supported upon arms 46 projccting up from the top-plate and the rod is provided with two paralli/l longitudimil grooves 47 which receive twd scts of anti-friction rollers 4S-- -l-S In order to prevent the carriage from lifting, we provide the sleeve 43 with pins 50 which nornnilly are out of contact with the underside of the traverse rod.

The plalcn carriage comprises a four-sided frame madc up of cnddates 51, the roar bur '52 and front connccting bars 53 '54.

hccurcd to thc rcn r bar 52 are forks 55 and a bearing arm so that coopcratc with thc slccvc -l-i and with projections 36 that arc carried by thc truck, to effect a longitudinal movement of the pinion carringc with lhc truck and to permit a t i'ul|s\'crsc movement of the platen fraioc for upper and lower case printing as will hcrcinaftcr appear and also to pcrmil thc plalcn carriage and frame to bc swung lntck around the sleeve l3 when dcsil'Od.

'lhc cnd plulcs Sl of thc platcn carriage may be pl'ovidcd with slotted bearings 57 for thc rcuopl ion of a shaft 58 of the plzttcn 59 and may likewise be providcd with hearing surfaces 60 for anti-friction rollcrs (H that are carried by the platen frame in substantially the same manner as in the well known Densmore machine.

The bar 54, in addition to forming a connecting bar between the end plates of the platen carriage, may be grooved as indicated at 62 to form a track-way for anti-friction rollers 63 that are carried by a shift bar 4 and this shift bar is provided with depending arms 65 which are pivoted to the framing of the machine. There are two of these depending arms, and a rock shaft 66 extends from side to side of the machine and serves as pivots for the arms. The depending arm 65 at one side of the machine, preferably at the left hand side, is extended to form a dc pending projection or arm 67 which is slotted or ape'rtured at 68. Pivoted to the lower end of this arm and on the inner side thereof at 69 is a vibratory link 70 which has a transverse slot 71 formed on an arc struck from the pivot 69 and a slot 72 in the link radiates from the pivot 69. The upper end of this link is pivotally connected at 73 to a twopart adjustable connecting rod 74, the lower end of said rod being pivoted to a shift key lever 75 at 76. This shift key lever 75 is provided with the usual key 77, and is rigidly connected to an arm 78 extending from a rock shaft 79, which is mounted in suitable hearings in the framing of the machine and extends from side to side thereof. The right hand end of the rock shaft 79 is connected in a similar manner to a shift kcy lever 80 having a key head 31.

Pivoted at 82 on the outer side of the arm 67 is a three-:1 rm lever 83, one arm of which constitutes or forms a finger piccc N-t by which the lover may bc shifted by hand: the sccond arm 35 is pivotally c onncclcd at so to an extension of a coiled eonlructilc spring 87 which is connected at its lowcr end to a lixcd adjusting bar 35, the lowcr facc of which is provided with serrations Ht) to cngngc thc lower hooked end of the spring and retain it in thc position to which it is :uljusicd along thc bar 38. The third arm of thc lcvcr 33 carries a pin 90 that projects through the opening or slot 63 in the depending arm (57 and into the radial opening 72 in the link 70. it will be observed that the slot 6h conforms substantially to an arc struck from the pivot 82 us a ccntcr. Beyond both sides of the dcpcnding arm (57, in which it is lixcd, thc lcft hand projecting end of said pivot is providcd with the (bird arm of thc lcvcr 33, while the right hand extension of said pivot enters thc slot 71 in the link 70 and limits :1 vibratory movcmcnl Ihcrcof. This portion of the pivot is llcndcd, us shown in Fig. 1, so as lo ovcr-lic thc cdgcs of thc slol 71 and scrvc as a guidc for the link To in its swinging movcmcnls about lllc pivot on.

It will be seen that the tension of the spring 87 is exerted to maintain the shift bar and platen carriage to the rear, when'the par-tsare in the positions represented in Fig. 1.. It will likewise be observed that when the parts are in the positions represented in pivot or shaft 66 and the upper end of the link 7'0 is moved to the opposite or rear side of the pivot or shaft 66 by reason of the pin and slot connection JO-72, between the lever83 and the link 7 0.- The respective points of connection of the upper ends of the spring and the rod 74, are always on opposite sides of'the pivot or shaft 66 of the shifter bar, and when the point of connection of the spring is in the rear of said pivot or shaft 66,

the spring operates to maintain the carriage and platen in their rearward positions and to restore them thereto after they have been shifted forwardly by a depression of either of the shift keys 77 or 81, the depression of either of said keys causing a downward pull on the connecting rod 7 4 which,- acting on the stud 73 and the link 70, effects a slight rocking of the arm 67 on the pivot 66 and a for.- ward movement of the shifter bar and platen carriage when the parts are in the position .shown in Fig. 1. When, however, the finger piece 84 is depressed, the lever, of which it f-forms a part and which carries the upper end the spring, is swung forwardly while the which 1s connected to said lever and ,tvhich carries the rod 74 is swung rearwardly so that in the changed position of theparts the spring willthen act to maintain the car'- riage and the platen in their forward positions and to restore them thereto after either the shift keys 77 or 81 has been depressed 'and then'released. In the position of the parts at Fig. 1, the platen may be said to be in condition to receive the impressions of the lower case types but when moved forwardly, by depressing either shift key, the platen will be in proper position to take ,type impressions from the upper case types. When the fingerdrey 84 has been pushed down, as before explained, the platen will then be held normally in upper case position, or for the printing of all capitals, but when itmay be desired to'imprint the lower case characters, theplatcn may be shifted rearwardly temporarily by depressing either one of the shift keys, and then, after prfnting such types, the platen will be restored again to the normal or upper case position by relieving the shift key from pressure. x

When the parts are shifted from the posiated means.

tion represented in Fig. 1, the shift keys 77 and 81 will be maintained in the same positions that they were in before the .shifting was effected and both of said keys are operable at all times to temporarily shift the platen from one case position to another.

The finger piece 84 and its immediate connecting dew'ce constitute what we term a permanent shifting mechanism, because the movement thereof will cause the shift bar to move the platen to either the up er or lower case printing position and with t. 1e aid of the sring 87 retain it in such position. Thes ift keys 77 and 81 we term temporary shift keys because they are operable to move the platen from the )osition to which it has been shifted or moved by the permanent shift key mechanism, but the platen will be restored to its initial position, determined by the permanent shift key, as soon as pressure is released 85 from the so-called temporary shift keys 77 or 81. This.'shifting mechanism is of especial advantage in that it V provides means for shifting the platen frame to the lower or upper case printing position and likewise provides a temporary shift key at each side of the key board, which keys are at all times operable to move the platen from the position to which it has been moved by the permanent shift key and permit the platen to be restored to such position as soon as pressure upon either of the temporary shift keys is released. l

Certain of the features shown and described are not claimed herein but constitute the subject-matter of other pending appliea-- tions.

What we claim as new and desire to secure by Letters Patent, is 4 i 1. In a typewriting machine, the combinati on of a paper carriage,- a transversely mov' able platen, key operated means for moving the platen transversely to any one of a plurality of positions and for retaining it in the position to which it has been moved, temorar shift keys one at each side of the keyhoarc a rigid connection between said temporary shift keys, operative connections between one of said tem orary shift keys and the key operated mcc ianism whereby both shift keys are operable to move the platen transversely from the position to which it has been moved by the first mentioned key 0 erated mechanism and for permittingsaid p aten to be restored to its initial position when pressure is removed from either 'of the temporary shift keys, both of the said temporary shift keys being at all times operable irrespective of the position of the key oper- 2. In a platen shifting device fortypewriting machines, the combination of a shift rod,-a pivoted depending arm connected to said shift rod, a spring, an arm which is pivoted to the depending arm of the shift rod and two temporary and is connected hand operated means for moving the pivoted arm to shift the tension of the spring to either side of the center on which. the shift rod swings to apply the force of the spring in either one of two directions and thus move the shift rod accordingly, a rod as 74 controlled by said hand operated. means and ads ted at all times to act in op osition to said spring, and a plurality of 'inger keys which are at all times operable to actuate the rod 74 and to enable it to he automatically restored when pressure on the actuated finger key is released.

3. in St typewriting machine, the combination of a shiftable member, means for holding said shiftahle member in either lower or upper case position at Will, a transverse rock shaft connected to said shiftable n'iember,

shift keys one on each.

side of the keyboard and. both connected to to one end of the spring, seid rock shaft on the same side of its axis,

whereby both said tern orary shift keys are adapted to shift theshi table member in. the same direction from normal position,-tlntt is to say, from lower case to upper case position or from upper case to lower case position according as the shiftable member is permanently held in one or the other of the two case positions and to afford an automatic return movement of the shiftahle member when pressure on the actuated tcm-' porzrry shift key is released.

Signed at the borough of Manhattan, city of New York, in the county of New York, and State of New York, this second day of June, A. D. 1902.

1 AL'PER J. BARRON. HENRY W. MERRIT'I, Vitnesses K V. DONOVAN,

E. M. WELLs. 

